Apparatus for applying alpha soft-metal surfacing to hard-metal plates



April29,1930- A. GUNTHARD I 1,756,739

APPARATUS FOR APPLYING A SOFT METAL SURFACING TO HARD METAL PLATES FiledSept. 7, 192.8

. INVENTOR WITNESSES s17 Guntkaraz ATTORN EY Patented Apr. 29, 1930AUGUST GUNTHARCD, 0E ARGOLA, NEW JERSEY, ASSIG'HQR TO THE CHEMICALEQUIP- KENT MANUFACTURING COMPANY, OF PATERSON, NE?! JERSEY, ACORPORATION OI NEW JERSEY AI'PTUS FGR AEPLYIDIG A SOFT-METAL SURFACES}TO HARD-METAL ELATEQ Application fi led September 7, 1928. Serial No.304,602.

This invention relates to the art of coating hard metals with softmetal, and pertains more particularly to a method of and an apparatusfor applyin the soft metal surfacing to hard metal plates, sheets orstrips.

At the present time containers or receptacles used in the chemicalindustry which are constructed of steel and which are provided with asoft metal coating or lining such as lead are produced almost entirelyby hand metho' s, in which the coating or hning in a soft or fluid stateis placed upon or within a receptacle and subsequently smoothed off by afinishing operation.

The present invention comprehends a method of applying the coating ontothe sheets, strips or plates from which the receptacle is to besubsequently constructed, by flowing said substance While in a fluidmolten state onto the plate While the same is bein fed successively overa heating medium an subsequently over a cooling medium and providinmeans for automatically smoothing off t e coating substance to a uniformthickness or depth prior to the same reaching the point of cooling.

The invention further aims to provide a simple, effectual andinexpensive apparatus for accomplishing the method set forth.

With the above recited and other objects in view, reference is had tothe following description and accompanying drawing, in which there isexhibited one example or embodimentof the invention, while the claimsdefine the actual scope of the same.

In the drawing- The figure is a diagrammatic longitudinal sectional viewof the apparatus illustrating the manner in which t e plates, sheets orstrips are coated.

Referring to the drawing by characters of reference, the apparatusemployed includes a pair of superposed rollers 10 and 11 and alongitudinally spaced pair of superposed rollers 12 and 13. v Adjacentthe lower roller 11, a battery of burners or heating pipes 14 areprovided for directing upwardl flame jetsto heat from the under side abla e, sheet or stri A of the material which is to be coated wit thecoating B. Adjacent the lower roller 13, a. battery of pipes 15 havingoutlets 16 for directing against the under side of the plate, sheet orstrip A cooling-blasts, is provided. The apparatus further 1ncludesbetween the heating and cooling means a bafiie element 17. At the pointWhere the sheet, strip or plate A is subjected to the action of theheating means 14, the coating substance O is caused to gravitationallyflow onto the upper surface of the plate from a suitable source ofsupply 18, it bein understood that the coating is in a molten uidstated. The rollers 10, 11, 12 and 13 are caused to rotate in thedirections indicatedby the arrows in any desired manner for effectingthe feeding of the plate horizontally through the a paratus. Immediatelyprior to reaching t e point where the plate is cooled by the coolingmeans 15, a doctor plate or scraper 19 is disposed for smoothing thesame off toa uniform thickness or depth. After passing this point, thecoating under the action of the cooling means 15 hardens or solidifiesand adheres to the surface of the late, strip or sheet A. The rollers 12and 13 tins cooperate with the coated strip, sheet or plate and feed thesame therebeyond. If desired, the upper surface of the coating B may befurther subjected to a smoothing action by a rotary cutter or cutters 20provided for the purpose. If desired, the source of supply 18 or thedischarge outlet thereof may be caused to move laterally or transverselywith respect to the path of movement of the plate, sheet or strip A, andlikewise the cutting element 20 for smoothing the same may be caused tomove lziterally to the path of movement of the p ate.

The method employed consists essentially in applying a soft metal coatinto hard metal plates, sheets or strips by feeding the plates horizontallover a heating medium and a cooling me ium successively, flowin thecoating substance while in a heated fluid state onto the plate at thepoint of heatin and finally smoothing the same oif to a uniformthickness or depth prior to reaching the point of cooling andsolidifying.

By use of the apparatus heretofore specified and by following the methodoutlined, it is me obvious that the'sheets, strips or plates ma becoated by a continuous operation to e fect a material saving over thehand operation and to obtain a more uniform coating 5 than can beaccomplished by the hand methods. It is also apparent that the plates,sheets or strips when coated may be bent or otherwise formed intocontainers or receptacles for vuse in the chemical industries.

What is claimed is:

1. An apparatus for applying a soft metal coating or surfacingtovhardimetalplates, sheets, strips or the like co'mprising means forfeeding the same horizontally, in a given direction, means below theplate for progressively heating and cooling the same in the dircction ofits movement, means for flowing onto the plate at its initial point ofheatin the coating substance while in a heated flui 29 state and meansfor smoothing off the upper level of the coating While heatedto auniform thickness or depth.

2. An apparatus of the character set-forth comprising a plurality ofpairs of driven superposed feeding rollers ada ted to coact with aplate, sheet or strip to e coated for feeding the same in a givendirection, subterposed means for heating the plate initially, superposedmeans for flowin a coating 30 substance while in a heated flui stateonto the plate at the point of heating, subterposed means forsubsequently cooling the plate and superposed means for smoothing offthe coating while heated to a uniform thickness.

3 3. An apparatus of the character set forth comprising a gluralit ofpairs of driven superpose fee 'ng ro lers acla ted to coact with aplate, sheet or strip to e coated for feeding the same in a ivendirection, sub- 40 terposed means for heating the plate initially,superposed means for flowing a coating substance while in a heated fluidstate onto the plate at the point of heating, subterposed means forsubsequently cooling the plate,

superposed means for-smoothing off the coating while heated to auniformthickness or depth, bafl'le means interposed between the heating andcooling means for insulating the same from each other.

o AUGUST GUNTHARD.

